Rounding in repeated calculations

See how rounding at each step of a multi-step calculation lets errors build up, and compare with answers kept exact until the end.

⏱ 18 min❓ 9 questions

What you'll be able to do

✔I can show how rounding early in a calculation changes the final answer
✔I can explain why errors grow when a rounded value is multiplied or raised to a power
✔I can use calculator memory or exact values so that I round only once, at the end

How this works

1Read the short explanations first — they teach you what you need before each question.
2Answer each question, then tap Check. A right answer moves you on automatically; if it's wrong, you'll see a friendly explanation of why.
3Finish all 3 steps to see your score — sign in and subscribe to unlock the full lesson and save it.

What's inside

9 questions and 1 quick teaching card, including:

🔢Number answer — Work out the answer and type the number.

👪Grown-up tip: sit alongside younger learners for the first few lessons. Read the questions together and chat about the explanations — that's where the real learning sticks.

Curriculum: AC9M10N01